Device for canting logs and operating saw-mill dogs



(No Model.) 2 Sheets-Sheet 1.

E; BEARD.

DEVICE FOR GANTING LOGS AND. OPERATING SAW MILL DOGS.

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2 Sheets-Sheet 2.-

(No Model.)

B. BEARD.

DEVICE FOR GANTING LOGS AND OPERATING SAW MILL DOGS.

Patented Nov. 13, v 1888.

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STATES EDVIN BEARD, OF ANTIGO, WISCONSIN.

DEVICE FOR CANTING LOGS AND OPERATING SAW=MILL DOGS.

SPECIFICATION forming part of Letters Patent No. 392,841, dated November 13,1888.

Application filed February .2, 1888. Serial No. 262,705.

To all whom it may concern.-

Be it known that I, EDWIN BEARD, of Antigo, in the county of Langlade,and in the State of Wisconsin, have invented certain new and useful Improvements in Devices for Oanting Logs and Operating Saw-Mill Dogs; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates to devices for cant-ing logs and operating saw-mill dogs, and will be fully described hereinafter, and pointed out in the claims.

In the drawings, Figure 1 is a front elevation of the entire machine. Fig. 2 is a plan view of the upper part of the machine. Fig. 3 is a section on the line 3 3 of Fig. 2. Fig. 4. isa detail of thelog side of the machine. Fig. 5 is a section on the line 5 5 of Fig. 3. Fig. 6 isavertical longitudinal section of the machine on the line 6 6 of Fig. 1. Fig. 7 is a detail ofthe dog and attachments. on the line 8 8 of Fig. 7. Fig. 9 is a section on the line 9 9 of Fig. 7. Fig. 10 is a detail view illustrating the operation of the valve, and Fig. 11 is asection on the line 11 ll of Fig. 10.

A represents a saw-mill carriage provided with axles a a and wheels B B, running upon tracks in the ordinary way, and carrying an ordinary head-block, O, on which the kneeshank 1) travels back and forth in the ordinary manner, and to this knee'shank I) my machine is secured, (as by bolts 0, passing through webs or flanges (1, formed at the base of said machine,) and the log side D of my machine forms the upright portion of the knee, which is cast solid with the cylinder E, the latter being open at the bottom and resting on the knee-shank, with, preferably, an interposed sheet of packing, as shown at e in Fig. 3, to make a tightjoint.

The top of the cylinder is provided with a cap, F, held in place by screw threads,,as shown, or by bolts, or otherwise, and fitted with a stufiingbox, f, and through these parts extends the piston-rod g of the piston-head G within the cylinder, the said rod at its upper end being secured at h to the horizontal. portion of a rightangled cross-head, H whose vertical part is provided with a central vertical slot to enable said cross-head to slide up and down on the standard I, (which is solid with the cylinder E, as shown in Fig. 5,) as hereinafter explained.

Fig. 8 is a section (No model.)

Beneath the cross-timbersi i of the carriage A are blocks jj, shaped on their under sides to receive the airstorage chamber J ,which is preferably cylindrical in form and held to place just below the axles a a of the carriage in any suitable manner, as by means of U-boltsKK, passing around the under side of the chamber J and up through perforations in the blocks j and timbers z, and secured by nuts 76. One head,j,ofthe chamberJis provided with a pop safety-valve, j", and the other head, j is provided with a central opening for the hollow plunger-rod K and with a stuffing-box, j, on the outside, and a seat, j on the inside, to receive one end of a pump-cylinder, J, Whose other end is provided with ahead having a valve, j, and flanges f, to form a support for said end of said pump-cylinder.

The plunger-head k is perforated and has a valve, 76*, while the other end of the plungerrod K is furnished with a rounded or ball head, it, near which the plunger-rod is provided with a number of perforations, k is", communicating with the bore of the plungerrod, and said ball-head k being adapted to be received and held between the springs K K on the adj ustable bunter L, which latter is adapted to slide on its guide K as far as the stop k will permit, a weight, K, being secured to said bunter by means of a cord or chain, is, passing over a suitable pulley, Id, and the plunger-rod K being provided with a solid collar, it just forward of the described perforations 7c, and the carriage A having a rear cross-timber, i, and a block, 2' andjournalbox d, all held to the carriage by bolts 6* and nuts i", the plunger-rod K passing through said journal-box, which latter not only serves as an additional support for said plunger-rod, but is further adapted to impinge against the described collar it on the plunger-rod, and thus force the ball-head it against the adjustable bunter L in the backward travel of the carriage, while when the carriage reaches its extreme backward limit it is stopped by a stationary bunter, L, all as clearly shown in Fig. 6.

M is a stationary guide-bar secured to the cross-head H, as by countersunk screw-bolts m m, and provided with a series of holes, in, and the edges of this guide-bar are preferably beveled off, as shown in Fig. 8, to receive and hold the vertical] y-movable clip M, which carries the dog M", which latter has a point, m and a series of holes, at m, to receive the inncr end of the securing-bolt m", which passes through a loop, in on the clip M, said bolt having a transverse pin, m, and a spring, of, surrounding said bolt between said pin and said loop, and thus keeping the end of the bolt into whichever hole m of the dog M" is opposite it at any time in the lateral adj ustment of the said dog. Another securing-bolt, m. passes through the loop m andclip M into one of the holes m in the guide-bar M, said bolt having also a transverse pin, or, and spring m as shown in Fig. 9, so that the clip may be kept at any point desired in its vertical adjustment on the said guide-bar M.

The cross-head on the opposite side to that which carries the dog M is provided with a lug, n, to which is pivoted at n a cant-hook, N, having a curved lever-handle, N, as best shown in Fig. 1. I usually cast an extra lug, a, on the opposite side of the cross-head, as best shown in Figs. 2 and 5, so that I may pivot the cant-hook to this side, if preferred; but in such case I would have to put the dog on the side where I now show the cant-hook,

as these parts should be on opposite sides of the cross-head. V This cant-hook is kept normally in the position shown in Fig. 1, with its point it out of contact with the saw, by means of a spring, a, connecting the lever-handle N of said cant-hook with the cross-head.

O is a pipe leading from the lower part of the cylinderE to an air-valve chest, 1?, and O is a short pipe-nipple leading from said chest into the upper part of said cylinder, as shown in Figs. land 3. This chest is provided with two ports, 1) and p, communicating, respectively, with pipe 0 and pipe-nipple O, and has an exhaust-port, 1), and is fitted with a valve, 1, having an exhaust-cavity, 19, while from the bottom of the chest there extends a pipe, 1, formed at an angle, the horizontal arm of which may be united tov the vertical arm by an expansion swivel-joint, (not shown,) if preferred; and the said horizontal arm of said pipe I? is connected by a flexible pipe, 1?, to the outlet-port of the air-storage chamber J. The lever Q of the valve 1? has a right-angled extension, q, whose extreme end is straddled by the forked lower end of an arm, R, whose upper part is secured to the cap F of the cylinder E, and thence projects downward alongside the upper part of the said cylinder, and then out, and is again bent and bifurcated at r r to receive the said extension (1 of the valve-lever Q, to which it is united by a bolt, R, screw-threaded at each end, and with washers r 1' above and below the point of union, and springs 'r" a bearing against these washers and against nuts 1-" r on the ends of the bolt R, as clearly shown in the detail views, Figs. 10 and 11.

From the rear end of the cross-head H there extends a lug or arm, h, which is perforated at h to receive a vertical rod, S, which is provided with an upper collar, 3, and another collar, 8, below said lug or arm h, while the extreme lower end of this rod S is secured to the extension q of the valve-lever Q, as shown in Fig. 1.

The operation of my device is as follows: I will suppose the log to be in the condition shown in Fig. 1 and ready to cant and all the parts in the relative positions shown in Figs. 1 and 6. The operator, located on the side of my device opposite to that which holds the log, seizes the levers N and Q. and draws the canthook lever N toward him, which sends the point a of the cant-hook N under the log, and at the same time pushes the valve-lever Q from him, which moves the valve 1?, so as to open the port 1), and permits the compressed air in the air-storage chamber J to rush up through portj and pipes P and 1? into the air-chest 1? below the valve and out through said port 1) and pipe 0 into the cylinder E beneath the piston-head G, raising the same and elevating the cross'hcad H, attached to the piston-rod g, and at the first upward motion of the cross head the dog is raised from contact with the log before the cant-hook operates, and then the said cant-hook N is raised, thereby canting the log, while at the same time the forward motion of the valve-lever Q depresses its extension q and the lower spring 1' on the bolt B, so that the moment the log is safety cushion device to prevent breakage.

The dog 1 is then lowered according to the reduced height of the dog in its new position, and the handle of the valve-lever is pulled to ward the operator, reversing the action of the valve and admitting the air under pressure above the piston-head, thereby driving the point in of the dog into the log, and similarly, as before, if the lever Q is not released at the proper moment, (or if the dog has not previously been lowered to the proper point,) the cross-head will descend until the arm h strikes the lower collar, 8, on the rod S and causes a reverse motion of the valve similar to that above described.

The above description presupposes that the storagechamber J is filled with compressed air, which is obtained by the motion of the carriage, as hereinbefore described. The hol low plunger-rod K, hold fast by the springs of the adjustable hunter L, fills with air through the perforations 7c, and as the carriage moves forward a vacuum is created in the pump-cylinder J, which draws the air through the plunger-rod and valved plunger-head,and then, as the carriage reverses, this air is com- IIO pressed Within said pump-cylinder and forced through its valved head into the storage-chamber J. If the carriage moves forward beyond the length of theplunger-rod, the valved head of the latter will come against the rear head of the storage chamber, and the springs K on the hunter L will yield and release the ballhead of the plunger-rod, thereby preventing any damage, and on the reverse motion of the carriage the springs K will again receive and hold the ball-head of the plunger-rod.

My device, though shown and described with special reference to the use of compressed air, may be adapted for the use of steam by making such obvious mechanical changes as would be necessary in the substitution of the one motive power for the other.

By my described safety-cushion device the valve I may be held on its dead-center when not in use and continuous action of the piston prevented. Further, I provide my valve with an enlarged exhaust-cavity, 1), so that when said valve is on a dead-center the compressed air (or steam, if such is used) may pass off without moving the valve, thereby relieving pressure from both ends of the cylinder at the same time.

The compressed air within my storag'echamber J serves as a means of retarding the carriage and forms a cushion on its extreme reverse movement before it strikes the stationary bunter L, and therefore greatly modifies the force of the contact at such time and prevents injury to the carriage.

Having thus described myinvention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination, with a saw-mill carriage and a cylinder, piston, and a separate storage-chamber containing fluid under pressure carried thereby, of a cross-head secured to the 'piston-rod and a dog and cant-hook scoured to said cross-head.

2. The combination, with a saw-mill carriage, of a head-block, a knee-shank sliding thereon, an upright knee, a cylinder secured thereto and to said kneeshank, a cross-head secured to the piston-rod, adog and cant-hook secured to said cross-head, a storage-chamber containing fluid under pressure carried by the carriage, and communicating pipes, and a valve-chest connecting said storage'chamber with said cylinder.

3. In a device for canting logs and operating saw-mill dogs, the combination, with a cylinder, piston, and a storage-chamber containing fluid under pressure, of communicating pipes and a valve-chest connecting the said cylinder with said storage-chamber, a cross-head coir nected to the piston-rod, a valve-lever having an extension, an arm projecting from the cy1- inder and connected to said lever-extension by a bolt, springs surrounding said bolt and impinging against said lever-extension, and a safety-cushion rod provided with collars and passing through an arm on the cross-head and connected to the valve-lever extension, whereby the said valve may be held on its dead-center when not in use and continuous action of the piston prevented.

4. In a device for canting logs and operating saw-mill dogs, the combination, with a storage chamber containing fluid under pressure, a separate cylinder and piston, a cross head carrying a dog and cant-hook and connected to the piston-rod, and communicating pipes, and a valve-chest connecting said storage-chamber and said cylinder and having suitable pressure and exhaust ports, of a valve having an enlarged exhaust-cavity communicating with said ports, whereby when said valve is on a dead-center the fluid under pressure may pass off without moving the valve, thereby relieving pressure from both ends of the cylinder at the same time. 5. The combination, with a saw-mill carriage and cylinder and piston carried thereby, of an air-storage chamber, a pump-cylinder supported within the latter, pipeand valve connections between the said cylindra-nd said storagechamber, a hollow plunger-rod moving within the pump-cylinder and having a perforated and valved plunger-head at one end and a ball-head and perforations at the other end, and an adjustable sliding bunter carrying springs for engagement with said ball-head of the plunger-rod.

6'. The combination, with a saw-mill carriage, of an air-storage chamber carried thereby aud provided with a release-valve, a pumpeylinder supported within the storage-chamber, a hollow plunger-rod moving within the pump-cylinder and having a perforated and valved plunger-head at its inner end, and a bunter adapted to stop the plunger,whereby the compressed air within the storage-chamber serves as a means of retarding the carriage and forms a cushion on its extreme reverse movement.

In testimony that I claim the foregoing I have hereunto set my hand, at Milwaukee, in the county of Milwaukee and State of \Visconsin, in the presence of two witnesses.

EDW IN BEARD.

Witnesses:

II. G. UNDER'WOOD, N. E. OLIPHANT. 

